package kr.saeildamil.androidstudy_second.fileio;

import java.io.File;
import java.util.ArrayList;

import kr.saeildamil.andrordstudy.second.R;
import android.app.Activity;
import android.os.Bundle;
import android.os.Environment;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

public class FileExplorer extends Activity {
	String mCurrent;		//현재 경로
	String mRoot;			//mnt/sdcard
	TextView mCurrentTxt;	//현재 경로 표시
	ListView mFileList;		//현재 경로상의 파일 정보 리스트
	ArrayAdapter<String> mAdapter;
	ArrayList<String> arFiles;	//파일정보들
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.ch25_fileexplorer);
		
		mCurrentTxt = (TextView) findViewById(R.id.current);
		mFileList= (ListView) findViewById(R.id.filelist);
		
		arFiles = new ArrayList<String>();
		mRoot = Environment.getExternalStorageDirectory().getAbsolutePath();
		mCurrent = mRoot;
		
		mAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, arFiles);
		mFileList.setAdapter(mAdapter);
		mFileList.setOnItemClickListener(mItemClickListener);
		
		refreshFiles();
	}
	
	public void mOnClick(View v){
		switch(v.getId()){
		case R.id.btnroot:
			if (mCurrent.compareTo(mRoot) != 0){
				mCurrent = mRoot;
				refreshFiles();
			}
			break;
		case R.id.btnup:
			if (mCurrent.compareTo(mRoot) != 0){
				int end = mCurrent.lastIndexOf("/");
				mCurrent = mCurrent.substring(0, end);
				refreshFiles();
			}
			break;
		}
	}
	
	private void refreshFiles() {
		mCurrentTxt.setText(mCurrent);
		arFiles.clear();
		File current = new File(mCurrent);//현재 작업중인 폴더에 있는 파일정보를 얻기위해 File 객체 생성
		
		String[] files = current.list();
		if (files != null){
			for(String fileInfo : files){
				File file = new File(mCurrent + "/" + fileInfo);
				String Name="";
				if (file.isDirectory()){
					Name = "[" + fileInfo + "]";
				}else{
					Name = fileInfo;
				}
				arFiles.add(Name);
			}
		}
		mAdapter.notifyDataSetChanged();
	}

	AdapterView.OnItemClickListener mItemClickListener = new AdapterView.OnItemClickListener() {
		public void onItemClick(AdapterView<?> parent, View view, int position,	long id) {
			String name = arFiles.get(position);
			if (name.startsWith("[") && name.endsWith("]")){
				name = name.substring(1, name.length()-1);
				mCurrent = mCurrent + "/" + name;
				refreshFiles();
			}else{
				Toast.makeText(FileExplorer.this, name, 1).show();
			}
		}
	};
}
